Great Benefit is a health insurance company with two types of customers: healthy persons and sickly persons.A healthy person has 1-to-5 odds of getting ill,and a sickly person has 1-to-1 odds of getting ill.However,the insurance company cannot distinguish between healthy and sickly persons.Brett is a risk-averse person who purchases health insurance from Great Benefit.Without insurance,Brett's income will be $8,000 if he remains healthy and $2,000 if he becomes ill.Brett's situation is diagrammed below. 
Definitions:
Overaroused
A state of heightened physiological and psychological activity, often leading to anxiety or restlessness.
Extrovert
describes a person who is outgoing, socially confident, and gains energy from being around other people.
Reticular Activating System
A network of nerves in the brainstem that mediates overall alertness and regulates the transition between sleep and wakefulness.
Extraversion/Introversion
Personality traits that describe the social preferences of individuals, with extraversion indicating a preference for external stimulation and social interaction, and introversion indicating a preference for solitude and internal experiences.
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